The real name of Bronzino is Agnolo di Cosimo. Option B is correct.
Agnolo di Cosimo usually called Bronzino, or Agnolo Bronzino, was an Italian Mannerist painter, born in Florence. His sobriquet, Bronzino, may refer to his relatively dark skin or reddish hair.
He lived his entire life in Florence, and from his late 30s was kept busy as the court painter of Cosimo I de' Medici, Grand Duke of Tuscany.